In a mixing bowl, blend together the yams, 1 egg, brown sugar, cinnamon, and nutmeg. Spread evenly on bottom of pie crust.

In a mixing, bowl, beat together the remaining egg, egg whites, corn syrup, sugar, and vanilla until mixture is frothy. Stir in pecans. Carefully spoon over yam layer. Bake for 50 to 60 minutes or until filling is set around edges or until a knife inserted halfway between the center and edge comes out clean.